In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.

Question: What is the current population of the city Shmuel's mother was born in? Passage:Shmuel Zytomirski was born in Warsaw (now in Poland, but then in Imperial Russia) on September 16, 1900. His father, Ephraim (1880–1941), who was born in the little town of Medzhybizh () in Podolia (now in Ukraine) was a member of Hovevei Zion, a follower of the Mizrachi movement, one of the Yavne School founders in Lublin and an active member in a "benefit society" charity fund in Lublin. Shmuel's mother, Chaya Devora (née Melamed) (1882–1942), was born in Riga (now the capital of Latvia, but then in Imperial Russia). At the age of 16, Shmuel graduated cum laude from Krinsky Jewish Gymnasium in Warsaw. During World War I the economic conditions in Warsaw became worse. In 1917, the Zytomirski family moved to Lublin, hoping to improve their economic status.

Shmuel's mother, Chaya Devora (née Melamed) (1882–1942), was born in Riga (now the capital of Latvia, but then in Imperial Russia)